My DD refused the bottle for ages, and was told to use a narrow neck bottle because she also kept pushing the teat out of her mouth. And it worked, she took at narrow neck Dr. browns bottle because it had a stiff teat.
I found that she could easily push the teat of the tommee tippee bottles out of her mouth because there was a lot of movement in the base of the teat.
Now the only bottle she will take is a MAM one with this flat teat which is really good
Good luck